JEE Main 2019 (Online) 9th April Evening Slot | Magnetics Question 181 | Physics

JEE Main 2019 (Online) 9th April Evening Slot

MCQ (Single Correct Answer)

-1

Two coils 'P' and 'Q' are separated by some distance. When a current of 3 A flows through coil 'P', a magnetic flux of 10^–3 Wb passes through 'Q'. No current is passed through 'Q'. When no current passes through 'P' and a current of 2 A passes through 'Q', the flux through 'P' is :-

3.67 × 10^–4 Wb

3.67 × 10^–3 Wb

6.67 × 10^–4 Wb

6.67 × 10^–3 Wb

JEE Main 2019 (Online) 9th April Evening Slot

MCQ (Single Correct Answer)

-1

A moving coil galvanometer has a coil with 175 turns and area 1 cm². It uses a torsion band of torsion constant 10^–6 N-m/rad. The coil is placed in a maganetic field B parallel to its plane. The coil deflects by 1° for a current of 1 mA. The value of B (in Tesla) is approximately :-

10^–4

10^–2

10^–1

10^–3

JEE Main 2019 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

A rigid square loop of side 'a' and carrying current I₂ is lying on a horizontal surface near a long current I₁ carrying wire in the same plane as shown in figure. The net force on the loop due to wire will be : JEE Main 2019 (Online) 9th April Morning Slot Physics - Magnetics Question 185 English

JEE Main 2019 (Online) 9th April Morning Slot Physics - Magnetics Question 185 English

Repulsive and equal to $$\mu $$₀I₁I₂/4$$\pi $$

Attractive and equal to $$\mu $$₀I₁I₂/3$$\pi $$

Repulsive and equal to $$\mu $$₀I₁I₂/2$$\pi $$

Zero

JEE Main 2019 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

The magnetic field of a plane electromagnetic wave is given by :
$$$\overline B = {B_0}\widehat i\left[ {\cos (kz - \omega t)} \right] + {B_i}\widehat j\cos (kz + \omega t)$$$ B₀ = 3 × 10^–5 T and B1 = 2 × 10^–6 T.
The rms value of the force experienced by a stationary charge Q = 10^–4 C at z = 0 is closest to :

0.6 N

0.9 N

3 × 10^–2 N

0.1 N

PREVIOUS NEXT